An animal lives in an environment where there are few predators, but the population is very dense. They likely have a life-history that is
A. r-selected, meaning there is rapid exponential increase in population growth
B. K-selected, meaning that the species will likely be well-adapted to crowded conditions
C. r-selected, meaning that the ability of individuals to compete with others is favored
D. K-selected, meaning high fecundity is favored
Answer: B. K-selected, meaning that the species will likely be well-adapted to crowded conditions
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A medical laboratory scientist (MLS) is examining a thin blood film from a patient suspected of having a Plasmodium infection. After examining the slide for 5 minutes and viewing approx-imately 100 oil immersion fields, the MLS does not observe any structures associated with Plasmodium. Which one of the following statements explains this discrepancy?
a. The stain may have been contaminated. b. The MLS should have examined each field under high dry magnification; there-fore the magnification is not correct. c. The MLS may have missed the organism; more than 300 fields should be viewed. d. No discrepancy is present. Plasmodium spp. are not found in blood; therefore the results are accurate.
Which type of RNA carries the code from the DNA to the site where the protein is assembled?
a. messenger RNA b. nuclear RNA c. ribosomal RNA d. transfer RNA e. structural RNA
In flowering plants how many egg cells are typically produced from each megaspore mother cell?
a. 1 b. 2 c. 3 d. 4 e. 8
Prokaryotic cells are diploid
Indicate whether the statement is true or false